//
// Created by 吴锐 on 2022/2/23.
//

#include<iostream>

using namespace std;

int func2(int a = 10, int b = 10);

int func(int a, int b, int c){
    return a + b + c;
}

int func2(int a, int b){
    return a + b;
}

int main(){

    int sum = func(10,20,30);

    cout << "sum = " << sum << endl;

    return 0;
}